We've seen this light on the street in early AM drizzly darkness. And, boy, did we seen it!
Similar in design to the Super Flash, but a slight change in optics makes a big difference.
Here's a comparison - Big Eye is on the right.
Super Flash diffuses light through its body and has a wider beam making it slightly more visible from the side. But Big Eye delivers more light rearward, in our opinion making it more effective. It's particularly noticeable when the lights are set to steady, non-flashing mode, which we prefer if either of these are used as your only taillight.